GPTMS-SiO2纳米流体的合成及其提高盐水层CO2储存效率的表征：分散稳定性、流变学和界面行为

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-05-12 DOI:10.1016/j.matchemphys.2025.131010

Ingu Kang, Hyeyeon Kim, Hyunsang Yoo, Jeonghwan Lee

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引用次数: 0

摘要

纳米流体（NFs）通过改变盐水含水层的界面特性，在提高二氧化碳储存效率方面表现出了很大的希望。然而，在高温、高盐度等恶劣的储层条件下，NFs容易聚集，从而降低其有效性并影响其存储性能。为了解决这一问题，我们提出了用（3-缩水氧基丙基）三甲氧基硅烷（GPTMS）进行表面改性合成二氧化硅NFs的方法，以提高地下CO2储存效率。通过目视观察、动态光散射（DLS）、透射电镜（TEM）和高温高盐条件下的混相试验，评价了合成的NFs的分散稳定性。研究了纳米颗粒的流变学和界面特性，为纳米颗粒在多孔介质中的流动提供了信息。7 d后，肉眼观察发现，纳米颗粒（NPs）含量超过0.5 wt%的纳米颗粒在25°C和100°C下没有聚集。DLS和TEM结果表明，在0.5 wt%以上的浓度下，即使在高温下，纳米颗粒的平均直径也保持在100 nm以下。混相试验表明，NPs含量大于1.0 wt%的NFs在20000ppm的高盐度条件下保持稳定。粘度测量表明，在高温下，NFs的粘度在剪切速率为35.63 ~ 70.89 s−1的范围内。此外，幂律模型的验证表明，所提出的剪切速率范围是可靠的，NFs具有温度相关的剪切变薄行为。使用1.0 wt%的NF对界面张力（IFT）和接触角（CA）进行测量，结果显示，与海水相比，界面张力（IFT）和接触角（CA）分别降低了22.7%和35.1%。这些结果表明，大于1.0 wt%的NFs可以用作注入液，以提高CO2的储存效率。

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Synthesis of GPTMS-SiO2 nanofluid and its characterization for improving CO2 storage efficiency in saline aquifers: Dispersion stability, rheological and interfacial behaviors

The nanofluids (NFs) have shown promise in enhancing CO₂ storage efficiency by altering interfacial properties in saline aquifers. However, under harsh reservoir conditions such as high-temperature and high-salinity, NFs tend to aggregate, which can reduce their effectiveness and hinder storage performance. To address this issue, we presented the synthesis of a silica NFs through surface modification using (3-glycidoxypropyl)trimethoxysilane (GPTMS) to improve the efficiency of underground CO₂ storage. Dispersion stability of the synthesized NFs was evaluated by visual observation, dynamic light scattering (DLS), transmission electron microscopy (TEM), and miscibility tests under high-temperature and high-salinity conditions. Rheological and interfacial properties of the NFs were also investigated to provide the information on the flow of NFs in porous media. Over 7 d, visual observation showed that the NFs containing more than 0.5 wt% of nanoparticles (NPs) did not aggregate at 25 °C and 100 °C. DLS and TEM results revealed that the NFs concentrations above 0.5 wt% had a colloidal stability maintaining an average diameter below 100 nm even at high temperatures. Miscibility test showed that NFs containing more than 1.0 wt% of NPs remained stable under the high-salinity of 200,000 ppm. The viscosity measurements revealed that the viscosity of the NFs should be derived in the range of shear rate from 35.63 to 70.89 s⁻¹ at high-temperature. In addition, the validation by power law model showed that the proposed shear rate ranges were reliable and the NFs had a temperature-dependent shear thinning behavior. The interfacial tension (IFT) and contact angle (CA) measurements using a 1.0 wt% of the NF revealed reductions of 22.7 % in IFT and 35.1 % in CA compared to seawater. These results suggest that the NFs greater than 1.0 wt% can be used as injection fluids to improve the CO₂ storage efficiency.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.